We have posted about this topic earlier, but there is not enough info so here is more information what Donald Marshall has said since 2012. There are clones created and consciousness is transferred to them. Here is a good video about 2 persons Randy Cramer and Elena Kapulnik who tell you about this technology, which is really backing Donald Marshall story:

“Inside the Secret Space Program is the first episode of this recurring monthly series where information is shared regarding the behind the scenes knowledge of humanity’s best kept secret: The Secret Space Program.

Featuring Randy Cramer and Elena Kapulnik: Insiders of the Secret Space Program. Randy Cramer holds over 20 years of experience serving as a Marine in the Mars Defense Force. Elena Kapulnik holds over 50 years of experience in the SSP and refers to herself as a Star Traveler. Together, Randy and Elena will be sharing their collective knowledge as we dive deeply into this secret interstellar organization.”